About — MilGPS

MilGPS is an iPhone app that shows your position as MGRS/USNG, UTM, latitude/longitude and OSNG in large, clear type, and brings maps, routes, track recording and mountain tools together in one place. No account needed; a one-time purchase on the App Store with no subscriptions, ads or in-app purchases.

MGRS · UTM · Lat/LongOffline mapsMountain tools17 languagesNo account

Features

CoordinatesMGRS/USNG (including UPS polar zones), UTM/UPS, three latitude/longitude formats and OSNG; 13 datums, grid precision down to 1 metre, three formats at once.

Your own screensBuild pages from DTG, position, accuracy, altitude, speed, course, compass, destination arrow, bearing and distance, cross-track error, sun/moon and track tiles.

Two map enginesApple Maps (standard, satellite, hybrid, 3D) and a MapLibre vector map (OpenFreeMap). Both draw live MGRS grid lines, a ruler, the destination line, routes and tracks.

Waypoints & overlaysCreate waypoints from GPS, the map crosshair, a distance/direction projection or fast grid entry; add photos, group them into overlays and edit in bulk.

Routes & tracksPlan routes that advance to the next waypoint on arrival; record tracks in the background, view elevation profiles; import and export GPX, KML and CSV.

AlarmsArrival, off-course, storm and turnaround alarms — delivered as notifications while MilGPS is in the background.

Mountain toolsBarometric altimeter with storm warning, slope/avalanche shading, hillshade, contour lines, Tobler hiking times, a suggested turnaround time, TracBack, an inclinometer and an SOS screen.

Field toolsResection and intersection, dead reckoning and pace count, coordinate converter, magnetic model (WMM2025), sun/moon (BMNT/EENT), SALUTE, 9-line MEDEVAC, position report and network-free waypoint sharing by QR code.

EverywhereHome and Lock Screen widgets, Live Activity and Dynamic Island, Siri and Shortcuts, optional iCloud sync, red night mode and battery saver.

Offline use

GPS needs no cell signal or internet. Position, grid, compass, waypoints, routes, track recording, alarms and tools all work in airplane mode. For maps, download the area beforehand.

Offline mode	What you get	How to prepare
Vector map pack	Roads, place names, water, forest and land cover; sharp at every zoom	Tools → Map Sources → Vector map (offline), or Tools → Terrain Data
Terrain data	Slope/avalanche shading, hillshade, contour lines, ground elevation where you stand, offline route elevation profiles	Tools → Terrain Data → download the area
Peaks, huts & water	OpenStreetMap points on the map and in search	Downloaded together with terrain data
MBTiles	Your own raster maps (topographic sheets, orthophotos…)	Settings → Map → Offline maps (MBTiles) → Import
Viewed tiles	Topo and imagery areas you have already looked at	Kept on the device automatically
Magnetic model	Magnetic declination (WMM2025, valid 2025–2030)	Built into the app, nothing to download

Example: the vector map, terrain data and peaks for a mountain area of about 19 × 8.5 km take roughly 9 MB in total. Apple does not make offline Apple Maps downloads available to third-party apps, so MilGPS uses its own vector packs and MBTiles files for offline maps.

What does it cost?

MilGPS is a one-time purchase on the App Store. There are no subscriptions, ads or in-app purchases; every feature is included.

Languages

English, Turkish, German, French, Spanish, Italian, Portuguese, Dutch, Swedish, Norwegian, Danish, Polish, Romanian, Hungarian, Russian, Arabic and Azerbaijani. MilGPS follows your iPhone's language; change it under Settings → Language.

Important

MilGPS is a navigation aid, not a certified navigation device, and it is not affiliated with any armed forces or government agency. Always carry a paper map and a compass in the field. Details: Terms of Use.

Who makes it?